Multi-Dimensional Uncertainty Analysis in Secure and Dependable Domain

Abstract—Most of the critical aspects for secure and depend-able systems, such as safety, integrity, availability, are related to uncertainty. Literature proposes many approaches to deal with uncertainty, mainly in the area of risk management and safety&reliability engineering. However, what is still missing is a clear understanding of the nature of uncertainty that very often has produced mistreatments in the design. In this paper, we propose a conceptual model for uncertainty that can be used to deal with systems ’ qualities such as security and dependability. Particularly, we will consider the relation between uncertainty-risk and how risk affects several quality attributes of the system. This understanding is necessary for the evaluation of design alternatives. We use a case study in Air Traffic Management to illustrate our approach. I